Terry,
You might consider four half wave sloping dipoles with the upper end hung out
about 3 – 4 feet from the top of the tower. I used this arrangement with four
Current baluns at the dipole center and 75 ohm feed. The feed points were
spaced 1/4 wave apart just as you would with any vertical array. This was
adjusted by where the far ends were located. I then used the COMTEK ACB-4
Hybrid Four-Square Systems include the 90 Degree Hybrid Relay Units to feed the
system. It worked very well, and had good front to back and front to side. It
heard well, but not as well as my Waller flag antenna. BTW, with insulated
guys I did not need to detune the tower to use the system. I have over 315
DXCC on 80 meters with this system.
73, PeteR N8PR
From: Topband <topband-bounces@contesting.com> on behalf of terry burge
<ki7m@comcast.net>
Sent: Tuesday, April 3, 2018 11:11:18 PM
To: topband@contesting.com
Subject: Topband: 80 meter 4-square
Hello Guys and Gals,
I have been planning on building an 80 meter 4-Square around my 117' tower. I
know it will likely require detuning the tower to make it 'invisable' to the
4-square so that is probably in the cards. Because of the difficulty of my
particular location have to consider shifting the array a bit. Wondering if
offsetting it from the tower a couple of feet to the east would matter? I've
also thought about slightly orienting the 4-square instead of on N-S-E-W to
turn it like 10 degrees where the north-south lineup of verticals would be more
like 10 degrees - 190 degrees and the east west accordingly. The reason for
this would be that the side hill to the NE where I have my one vertical has
about 5 foot dropoff to the level ground. Basically I like in a gorge area with
a seasonal creek through it but you deal with what you have of course.
Any thoughts pro or con?
Terry
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